You should be able to right click on the query you want to copy, select 'Copy' in the dialog that pops up, then right click on it again and select 'Paste' to paste a copy of it (be sure to give it a different name). If that won't work you can open the query in SQL design view (the one with the actual code showing), copy all the code and then create a new query and paste the code in SQL design view of the new query.
